The German company "HAMA" - well established for decades for photography and pc accessories - offer these two hubs which both work well with C940 laptops. I have tested these Hubs in the following combinations: C940 14", 9 in 1 hub: Connections: All connections work reliably PD charging : Will charge the device, needs 100 W PD capable USB-C power supply and cable. C940 14", 12 in 1 hub Connections: All connections work reliably PD charging : Will charge the device, needs 100 W PD capable USB-C charger and cable. C940 15", 9 in 1 Connections: All connections work reliably PD charging : Will not charge the device. C940 15", 12 in 1 Connections: All connections work reliably PD charging : Will charge the device, but not reliably and slowly. Needs at least 100 W PD capable USB-C power supply. For the daring only: Lenovo provides a 230 Watt power supply. One could try fitting this unit with a usb-c adapter and use it to charge both versions of the C940 - either via the Hama Hubs or directly via C940 TB 3 ports. Be sure to use certified 100 Watts cables, others might severely overheat! The array works for me in all above cases. However I am NOT using the array for daily work. Do not attempt this without constant supervision, both the hubs and the port might overheat. The array is purely experimental. I will not take any responsibility for "accidents" with this setup. Links: 9 in 1 Hub: https://de.hama.com/00135765/hama-9in1-usb-c-docking-station-fuer-4x-usb-a-usb-c-hdmi-lan-sd-microsd 12 in 1 hub: https://de.hama.com/00135761/hama-12in1-usb-c-docking-station-fuer-usb-hdmi-dp-lan-sd-microsd-klinke?bySearch=docking%20station Converter Lenovo slim to USB-C: https://www.amazon.de/ELECJET-Zertifiziert-konvertieren-ThinkPad-Kompatibel/dp/B07R7TZ79Y Lenovo 230 Watts power supply: https://www.lenovo.com/us/en/accessories-and-monitors/chargers-and-batteries/chargers/PWR-ADP-BO-Lenovo-230W-AC-Adapter-UL/p/GX20L29347

I apologise for the terrible formatting. I just cannot get the Lenovo Forum to accept formatted texts from my phone or from copy pastes from other sources. And I do not know where to reformat/edit my posts in the Forum. Perhaps sonebody could help me out?